Platyhelimenthes ....

• Bilateral symetry
  • if they are cut they can regenerate
• Acelomate body plan
  • has three layers of tissue and no cuelom but it does contain a body cavity for digestion
  • The ecteoderm layer is a thin layer of cells and uses cilia for movement
• Are invertabrates
• Their bodies are flat and thin due to the lack of advanced body organs, such as a respitory system and digestive system
• Flatworms take in oxygen through diffusion
• Flatworms have one mouth/anus, it both takes in food and expels waste out of the same place
• Over half of flatworms are parasidic, the most famous is the Taenia Solium which can be ingested and found in raw or lightly cooked food and causes epilepsy
• There are 3 main types of Flatworms
  • Dugesia-are found in fresh water and very few are parasitic
  • Trematoda- are parasites in animal tissue
  • Cestoda- are intestinal parasites\

Platyhelimenthes in Water

Cestoda tapeworm

HOOK: Platy=Plate, plates are flat just like Platyhelimenthes